发明公开
EP2370544A1 PHOSPHATE DE CERIUM ET/OU DE TERBIUM, EVENTUELLEMENT AVEC DU LANTHANE, LUMINOPHORE ISSU DE CE PHOSPHATE ET PROCEDES DE PREPARATION DE CEUX-CI
审中-公开
CE和/或TERBIUMPHOSPHAT WHICH可能包含镧，荧光从用于生产磷酸盐和过程
- 专利标题： PHOSPHATE DE CERIUM ET/OU DE TERBIUM, EVENTUELLEMENT AVEC DU LANTHANE, LUMINOPHORE ISSU DE CE PHOSPHATE ET PROCEDES DE PREPARATION DE CEUX-CI
- 专利标题（英）： Cerium and/or terbium phosphate optionally with lanthanum, phosphor resulting from said phosphate and method for preparing same
- 专利标题（中）： CE和/或TERBIUMPHOSPHAT WHICH可能包含镧，荧光从用于生产磷酸盐和过程
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申请号： EP09752385.6申请日： 2009-11-18
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公开(公告)号： EP2370544A1公开(公告)日： 2011-10-05
- 发明人: BUISSETTE, Valérie , LE-MERCIER, Thierry , BERNARD, Joël , AURISSERGUES, Franck
- 申请人： Rhodia Opérations
- 申请人地址： 40, rue de La Haie-Coq 93306 Aubervilliers FR
- 专利权人： Rhodia Opérations
- 当前专利权人： Rhodia Opérations
- 当前专利权人地址： 40, rue de La Haie-Coq 93306 Aubervilliers FR
- 代理机构： Dubruc, Philippe
- 优先权： FR0806503 20081120
- 国际公布： WO2010057921 20100527
- 主分类号： C09K11/81
- IPC分类号： C09K11/81 ; C01B25/45
摘要：
The invention relates to a rare earth (Ln) phosphate, Ln being either at least one rare earth selected from cerium and terbium, or lanthanum in combination with at least one of the two above-mentioned rare earths, that has a crystalline structure of the rhabdophane type or of the mixed rhabdophane/monazite type with a potassium content of 7000 ppm at most. The phosphate is obtained by the precipitation of a rare earth chloride at a constant pH lower than 2, by calcination at a temperature lower than 500°C and by redispersion in hot water. The invention also relates to a phosphor obtained by the calcination at at least 1000°C of said phosphate.
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